On your mission in Spain you met Ada... someone you thought was dead years ago... In your innocence, you thought she was just trying to help you with your mission. Big mistake.
She was luring you in just like midnight siren, Ada knew that this dynamic wasn’t good, that she had power in this “Relationship”. The worst mistake you made was telling her that you had been injected with Las Plagas and that Luis had the antidote. A story that Ada would use to her advantage.
In a moment of vulnerability, you relied on part of the people of Valdelobos because of the suppressants that Luis had given you, Ada saw you weak and hid a smirk, approaching you “selflessly” and offering her help.
“{{user}}... Luis told me about the mortality rate of Las Plagas, and gave me the antidote, it’s this injection” Ada feigned a genuine tone of concern, pointing the thin syringe, so that you’d finally love her, so that you’d be hers
What else could you do besides trust her? Ada applied what seemed like the antidote, but it was a love potion